commandhandler.py 文件源码

def _on_command_error(self, exception, ctx):
        # non-existing commands won't trigger check thus are not deleted
        if isinstance(exception, dec.CommandNotFound) and not isinstance(ctx.message.channel, discord.PrivateChannel):
            await self._bot.client.delete_message(ctx.message)

        # get a cause if the exception was thrown inside the command routine
        if isinstance(exception, dec.CommandInvokeError):
            exception = exception.__cause__

        # now inform the author of the command on the failure using PMs
        await self._bot.client.send_message(ctx.message.author, str(exception))

        # log the error for debugging purposes
        log.debug('Command \'{}\' invoked by {} raised an exception\n{}'
                  .format(ctx.command, ctx.message.author, ctx.message.content), exc_info=exception)